使用HttpStaus自定义返回状态

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>

            <!-- 这个是剔除掉自带的 tomcat部署的-->
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>

        </dependency>

import java.util.HashMap;
import java.util.Map;

import org.springframework.http.HttpStatus;

public class R extends HashMap<String, Object> {
    private static final long serialVersionUID = 1L;
    /***返回码101：卡号已存在*****/
    public final static Integer RESULT_CODE_101=101;
    public final static String RESULT_CODE_101_TEXT="数据已存在";
    public R() {
        put("code", 0);
    }
    
    public static R error() {
        return error(HttpStatus.INTERNAL_SERVER_ERROR.value(), "未知异常，请联系管理员");
    }
    
    public static R error(String msg) {
        return error(HttpStatus.INTERNAL_SERVER_ERROR.value(), msg);
    }
    
    public static R error(int code, String msg) {
        R r = new R();
        r.put("code", code);
        r.put("msg", msg);
        return r;
    }

    public static R ok(String msg) {
        R r = new R();
        r.put("msg", msg);
        return r;
    }
    
    public static R ok(Map<String, Object> map) {
        R r = new R();
        r.putAll(map);
        return r;
    }
    public static R ok(int nums) {
        R r = new R();
        r.put("msg", nums);
        return r;
    }
    public static R ok() {
        return new R();
    }

    public R put(String key, Object value) {
        super.put(key, value);
        return this;
    }
}